I was playing through normally with Kwame as a leader and Emilia and Pedrinho as crew. Despite not having Victor Signac on my crew he appears as what seems to be a placeholder for some of the encounters on the Shangri-La adventure level.

If it helps here are additional details:
This occured on the Steam LIVE Build. I'm using Windows 7 with 8GB of RAM and AMD A10-6800K APU processor. Graphics Card is AMD Raden R9 200 series.
Unsure how often it occurs as this is the first time I've encountered it.
As it is a graphics placeholder bug it did not seem to generate any logs.
Prior to this run I did have Victor as a leader.